Paliurus spina-christi (Jerusalem Thorn)
Botanical name: Paliurus spina-christi
Common name: Jerusalem Thorn
Family: Rhamnaceae
Origin: Mediterranean region
USDA Plant Hardiness Zone Map
Shrub with branches provided with thorns. Clusters of yellow-greenish flowers. The fruit is a dry woody nutlet centred in a circular wing (in Chinese hat shape).
Link to this plant:
https://toptropicals.com/catalog/uid/paliurus_spina_christi.htm